For the pair of similar solids, find the value of the variable



A 12 mm

B 48 mm

C 20 mm

D 3 mm

Given the matrix, [tex]\begin{bmatrix}2 & 3 \\3 & 2 \end{bmatrix}[/tex], find its inverse.

First we need to find its determinant which can be done by using the following formula,

[tex]det=\begin{bmatrix}a & b \\c & d \end{bmatrix}=ad-cb[/tex]

Lets call  [tex]\begin{bmatrix}2 & 3 \\3 & 2 \end{bmatrix}[/tex] matrix "A."

So,

[tex]detA=(2)(2)-(3)(3)[/tex]

[tex]\Longrightarrow detA=4-9[/tex]

[tex]\Longrightarrow detA=-5[/tex]

We now have the determinant, we can now use the following formula to determine the inverse matrix,

[tex]A^{-1} =\frac{1}{detA} \begin{bmatrix}d & -b \\-c & a \end{bmatrix}[/tex]

[tex]A^{-1} =-\frac{1}{5} \begin{bmatrix}2 & -3 \\-3 & 2 \end{bmatrix}[/tex]

[tex]\Longrightarrow A^{-1} = \begin{bmatrix}2(-\frac{1}{5}) & -3(-\frac{1}{5}) \\-3(-\frac{1}{5}) & 2(-\frac{1}{5}) \end{bmatrix}[/tex]

[tex]\Longrightarrow A^{-1} = \begin{bmatrix}-\frac{2}{5} & \frac{3}{5} \\\frac{3}{5} & -\frac{2}{5}\end{bmatrix} \therefore \ Sol.[/tex]

*Note* I went a few more steps than the question needed. If you back up two steps on my answer is where they stopped. The last option is correct.

Answer: The best graph to illustrate June's situation is a cost-volume-profit (CVP) graph, which shows the relationship between the revenue, cost, and volume of goods sold.

In June's case, her fixed costs (the cost of the sewing machine) are constant and do not change regardless of the number of quilts she makes and sells. Her variable costs (the raw materials) are directly proportional to the number of quilts she makes and sell. Her revenue is directly proportional to the number of quilts she sells.

The CVP graph will show a line representing fixed costs, a line representing variable costs, and a line representing revenue. The point at which the total costs (fixed costs + variable costs) equal the revenue represents the break-even point, at which June neither makes a profit nor incurs a loss. Beyond this point, June will make a profit, and before this point, she will incur a loss.

The CVP graph can be used to determine the break-even point and to make predictions about the future financial performance of a business, based on changes in volume, costs, or price.

Step-by-step explanation:

The two statements  a iff b and (not a) iff (not b) has been explained

The two statements are known as biconditionals, which state that two statements are true if and only if each other.

"a iff b" means that "a" is true if "b" is true, and "a" is false if "b" is false. In other words, "a" and "b" have the same truth value.

"(not a) iff (not b)" means that "not a" is true if and only if "not b" is true, and "not a" is false if and only if "not b" is false.

Therefore, these two statements are equivalent because they express the same idea: "a" and "b" have the same truth value. If "a" is true, then "b" is true, and if "a" is false, then "b" is false. Similarly, if "b" is true, then "a" is true, and if "b" is false, then "a" is false.

These statements are true in cases where both "a" and "b" have the same truth value. If both are true or both are false, then the statements are true. If "a" is true and "b" is false, or vice versa, then the statements are false.

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The speed of the Atlas V Rocket was approximately 8,727.27 miles per hour, based on the given information that it could go one mile in 0.11 seconds.

To find the speed of the Atlas V Rocket, we need to use the formula:

speed = distance / time

In this case, the distance is 1 mile, which is equal to 1609.34 meters. The time is 110th of a second, which is equal to 0.1 seconds (since there are 10 tenths in a second).

So, plugging these values into the formula, we get:

speed = 1609.34 meters / 0.1 seconds

speed = 16093.4 meters per second

Therefore, the Atlas V Rocket traveled at a speed of 16093.4 meters per second.

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Answer:  None of the above

Step-by-step explanation: It's none because we need to divide the 70 apples by the 4 in the sample ratio. That's 17.5. Now, we need to multiply 3 by that. So, 17.5 * 3 = 52.5. That's equal to about 53 oranges. But, as we see that is not an answer choice. So, I believe it's none of the above.

4:3 = 53:70 (about 53)

The fraction of the students live more than 4 miles from school is 3/10.

A fraction represents a part of a number or any number of equal parts.

A fraction consisting of a quotient and remainder is a mixed fraction. we can convert the mixed fraction to improper fraction by first dividing the numerator by denominator and then taking the quotient as whole number and remainder as the numerator of proper fraction keeping the denominator same.

Given;

The percentage of students live more than 5 miles away=30%

Now,

The fraction;

=30/100

To convert it into the simplest from;

=30/100

=3/10

Therefore, the fraction in simplest form will be 3/10.

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The complete question is;

At Charles Walters Middle School, 30% of the students live more than 4 miles from school.What fraction of the students live more than 4 miles from school? Write your answer as a fraction in simplest form. ?​

The probability at least one of the two television does not work will be 7/9.

The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates to one hundred percent. It is symbolized by the character '%'.

The percentage is given as,

Percentage (P) = [Final value - Initial value] / Initial value x 100

Suppose you just received a shipment of ten television. Five of the televisions are defective. If two televisions are randomly selected. Then the probability is given as,

P = (5/10) x (5 / 9) + (5/10) x (5/9) + (5/10) x (4/9)

P = 25/90 + 25/90 + 20/90

P = 70 / 90

P = 7/9

The probability at least one of the two television does not work will be 7/9.

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By algebra properties and trigonometric formulas, the trigonometric expression (1 + cos x) / (1 - cos x) - (1 - cos x) / (1 + cos x) is equivalent to trigonometric expression 4 · cos x · csc² x.

In this problem we need to prove the equivalence between two trigonometric expressions, this can be done by using algebra properties and trigonometric formulas. First, write one side of the expression:

(1 + cos x) / (1 - cos x) - (1 - cos x) / (1 + cos x)

Second, use algebra properties to simplify the expression:

[(1 + cos x)² - (1 - cos x)²] / (1 - cos² x)

Third, expand the resulting expression:

(1 + 2 · cos x + cos² x - 1 + 2 · cos x - cos² x) / (1 - cos² x)

4 · cos x / (1 - cos² x)

Fourth, use trigonometric formulas to simplify the expression:

4 · cos x / sin² x

4 · cos x · csc² x

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Answer:

The ratio computed shows that the student's reasoning that there are now 5 red marbles in the bag for every 3 marbles is incorrect.

How to illustrate the ratio?

From the information given, there are 36 marbles in the bag. The number of red marbles will be:

= 5/9 × 36

= 20 marbles

The number of blue marbles will be:

= 4/9 × 36

= 16 marbles

When a student removes 1 blue marble from the bag, the number of blue marbles will be:

= 16 - 1

= 15 marbles.

Therefore, the ratio of red to blue marbles will be:

= 20:15 = 4:3

Therefore, the student's reasoning that there are now 5 red marbles in the bag for every 3 marbles is incorrect.

4214.7 is the balance in the account after 2 months .

What does compound and simple interest mean?

A fixed proportion of the principal amount borrowed or lent is what is known as simple interest and is paid or received over a given period of time.

                               Borrowers are required to pay interest on interest in addition to principal because compound interest accrues and is added to the total amount of interest from earlier periods.

P = $4200

R = 2.1% = 2.1/100 = 0.021  =

    T = 2 month = 2/12 = 1/6

   I = PRT

    = 4200 * 0.021 * 1/6 = 14.7

Amount = P + I = 4200 + 14.7  = 4214.7

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These terms describe various aspects of quantitative analysis and measurement in different scientific fields such as analytical chemistry, biology, and statistics.

A. Sensitivity - the ability of a measurement method or instrument to detect small changes in the quantity being measured.

B. Detection limit - the minimum amount of a substance that can be reliably detected by a measurement method or instrument.

C. LOQ (Limit of Quantitation) - the minimum concentration of a substance that can be accurately quantified by a measurement method or instrument.

D. Limit of Linearity - the range of concentrations of a substance over which the measurement method or instrument produces proportional results.

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Distinguish between the following terms:

A. sensitivity and detection limit

B. Log and limit of linearity

C. quantitation by calibration curve and the method of standard addition.

D. confidence interval and confidence limits

Answer:

So, for the values 5.6, 6, and 7, the inequality 15 < 3x is true. For the values 5, 3, 3/4, and 4.5, the inequality 15 < 3x is false.

Step-by-step explanation:

For the inequality 15 < 3x to be true, 3x must be greater than 15. To determine whether each value will make the inequality true, we can substitute each value for x and see if the inequality holds.

For x = 5.6, 3x = 16.8, which is greater than 15, so the inequality is true and the value 5.6 makes the inequality true.

For x = 5, 3x = 15, which is equal to 15, so the inequality is false and the value 5 does not make the inequality true.

For x = 3, 3x = 9, which is less than 15, so the inequality is false and the value 3 does not make the inequality true.

For x = 6, 3x = 18, which is greater than 15, so the inequality is true and the value 6 makes the inequality true.

For x = 7, 3x = 21, which is greater than 15, so the inequality is true and the value 7 makes the inequality true.

For x = 3/4, 3x = 2.25, which is less than 15, so the inequality is false and the value 3/4 does not make the inequality true.

For x = 4.5, 3x = 13.5, which is less than 15, so the inequality is false and the value 4.5 does not make the inequality true.

So, for the values 5.6, 6, and 7, the inequality 15 < 3x is true. For the values 5, 3, 3/4, and 4.5, the inequality 15 < 3x is false.

Answer:

58 11/12

Step-by-step explanation:

Add up each item within the suitcase + the suitcase after taking out the items to find the weight of the suitcase at the beginning.

30 + 7 1/4 + 21 2/3

Convert the fractions to have a common denominator

30 + 7 3/12 + 21 8/12

Add these up to get 58 11/12.

The geometric mean of 20 and 30 is 24.49.

What is geometric mean?

The Geometric Mean (GM) in mathematics is the average value or mean that, by calculating the product of the values of the set of numbers, denotes the central tendency of the numbers. In essence, we multiply the numbers together and calculate their nth root, where n is the total number of data values.

We are given two numbers as 20 and 30.

Formula for geometric mean is

G.M = √x₁ × ... × xₐ  

So, using this we get

⇒G.M = √20 × 30

⇒G.M = √600

⇒G.M = 24.49

Hence, the geometric mean of 20 and 30 is 24.49.

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If Paul uses the function y = 8x + 38 to model the situation, then the model predicts a score of:

86 for 6 hours of homework.

In the given problem, we are given a linear equation of the form y = 8x + 38, where y represents the score obtained by Paul and x represents the number of hours of homework done by Paul.

To predict the score for 6 hours of homework, we need to substitute 6 for x in the equation and solve for y. By substituting x = 6 in the equation, we get:

Therefore, the model predicts a score of 86 for 6 hours of homework.

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28.07 and 61.93 degree are the measure of other two angles.

The question talks about a triangle with 3 sides and angles. According to the trigonometry identities

sin x = 8/17

x = sin^1(8/17)

x = sin^-1(0.4708)
x = 28.07 degrees

Determine the measure of the longest leg

y = 45 - 28.07

y = 61.93 degrees

Hence the other two angle measures of a right triangle are 28.07 and 61.93 degree.

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There would be 30 trapezoids to create 5 hexagons.

An hexagon is a six-sided polygon. It is made up of six equilateral triangles and six trapezoids. To create an hexagon using pattern blocks, you need 10 equilateral triangles and 20 trapezoids. Therefore, to create 5 hexagons

The exact number of trapezoids needed to create three hexagons depends on the size and shape of the hexagons. However, in general, you would need at least 18 trapezoids.

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To create 5 hexagons using pattern block trapezoids, you would need 15 trapezoids. This is because 3 trapezoids form one hexagon.

In geometry, a hexagon can be divided into 6 equilateral triangles. In the context of pattern blocks, these triangles are often used to construct other shapes. Now, considering that a trapezoid in pattern blocks is usually made up of 2 of these triangles, it takes 3 trapezoids to create one hexagon. Hence, to create 5 hexagons, you would need 5 x 3 trapezoids, which equals 15 trapezoids.

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963.9 in³ cubic inches volume  of the treasure chest is taken up by the coins .

What does math's volume mean?

The volume of a 3D object is the amount of actual space it occupies. It is a 2D shape's 3D equivalent of area. Cubic units, such as cm3, are used to measure it. You may calculate this by multiplying its length, height, and width.

Remember that the volume of a cylinder is given by:

volume = (height)*pi*(radius)^2

Where pi = 3.14

Then here the volume of each coin is:

V = (0.0625 in)*3.14*(1.7 in)^2 = 5.67 in³

And there are 230 coins, so the total volume is

V = 170 * 5.67 in³

    = 963.9 in³

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Answer:

Step-by-step explanation:

the answer is 85.41 in^3

I got it right and I got to flvs .

Right Bisector also known as Perpendicular Bisector is a line that bisects another line segment at a right angle, through the intersection point.

First we will draw a line segment AB = 7 cm with the help ruler, then with vertex A, by using compass take more than half of AB and draw arcs, one each side of AB and mark them X and Y and then with vertex B, by using compass with same length again, cut the previous arcs at X and Y respectively.

Now, with help of ruler join the point X and Y. Thus XY is the perpendicular bisector of line AB.

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One chocolate chip cookie costs $0.50. This is found by setting up two equations using the given information and solving for the cost of one cookie.

To solve this problem, we can assume that the cost of one jumbo popcorn is P and the cost of one chocolate chip cookie is C. We can then set up two equations based on the given information.

The first equation comes from Julia's purchase, which includes one jumbo popcorn and two chocolate chip cookies. We know the total cost is $5.0, so we can write:

1P + 2C = 5.0

The second equation comes from Marvin's purchase, which includes one jumbo popcorn and four chocolate chip cookies. We know the total cost is $6.0, so we can write:

1P + 4C = 6.0

To solve for the cost of one chocolate chip cookie, we can eliminate P by adding the two equations. This gives us:

2P + 6C = 11.0

Dividing both sides by 2, we get:

P + 3C = 5.5

We can then substitute the value of P in terms of C from either of the two original equations into this equation, and solve for C. In this case, it's easier to use the first equation:

1P + 2C = 5.0

P = 5.0 - 2C

Substituting into the equation we just obtained:

(5.0 - 2C) + 3C

= 5.5

Simplifying and solving for C, we get:

C = 0.5

Therefore, one chocolate chip cookie costs $0.50.

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Answer:

2/21

simplify 8/84

Answer:

The experimental probability of the next vehicle sold being a minivan is 8/84 = 1/10.

Step-by-step explanation:

The experimental probability of an event can be calculated by dividing the number of successful outcomes by the total number of trials. In this case, we want to find the probability of selling a minivan, so we want to find the number of minivans sold divided by the total number of vehicles sold.

Therefore, the experimental probability can be calculated as follows:

Number of minivans sold / Total number of vehicles sold = 8 / 84

So, the experimental probability that the next vehicle sold will be a minivan is 8/84.

All the inequalities that represent the situation are as follows;

A. 0.5x + 0.25y ≤ 20.

C. 2x + 3y ≤ 120.

A combinations of necklaces and key chains you can make given the situation include the following:

A. 30 necklaces and 20 key chains.

In order to write a system of linear inequalities to describe this situation, we would assign variables to the number of necklaces and number of key chains respectively, and then translate the word problem into algebraic equation as follows:

Based on the table of values (see attachment) and given x ≥ 0 and y ≥ 0, a system of linear inequalities to describe this situation include the following:

0.5x + 0.25y ≤ 20.

2x + 3y ≤ 120.

Next, we would use an online graphing calculator to plot the above system of linear inequalities in order to determine its solution as shown in the graph attached below.

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Answer:yes

Step-by-step explanation:correct becuase

Answer:

Answer is ADB

Step-by-step explanation:

I believe that's the answer

Percentage of the tickets were discount tickets is 36 %, if 144 out of 400 tickets sold were discount tickets.

Percentage is a number or ratio that can be expressed as a fraction of 100. According to the question, at an amusement park, 144 out of 400 tickets sold were discount tickets.

This means total number of tickets = 400

number of discount tickets = 144

we, have to find percentage of the tickets were discount tickets

Let the percentage be x

therefore x% of 400 = 144

              [tex]\frac{x}{100}[/tex] * 400 = 144

               x = 144 ÷ 4

               x = 36

so, percentage of the tickets were discount tickets is 36%

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Two expressions p/12 and 12/p gives different values, and thus they are not equivalent so Darla is correct and Matt is incorrect.

A fraction represents a part of a whole.

To Check if Matt or Darla is correct, we need to check if the expressions 12 ÷ p and p ÷ 12 are equivalent.

To see whether the two fractions equivalent or not,  we can choose a specific value of p

Compare the two expressions.

let p = 6, then:

12 ÷ p

12 ÷ 6 = 2

p ÷ 12

6 ÷ 12 = 1/2

The two expressions give different values, and thus they are not equivalent.

Hence, Two expressions p/12 and 12/p gives different values, and thus they are not equivalent so Darla is correct and Matt is incorrect.

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The probability that a person responded Yes or was under the Age of 55 was C. 57 %

The probability that a person who responded either said yes or was under the Age of 55 is:

= Probability that a person answers yes + probability that a person is under 55 - Probability that a person was under 55 and answered yes

The probability a person who responded either said yes or was under the Age of 55 is therefore:

= ( 25 / 103 ) + ( 59 / 103 ) - 17 / 103

= 57 %

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The correct order of the ratios from the least to the greatest is given below:

4/2, 11 to 2, 22:3, 30/4, 36:5

Least to greatest: 4/2 = 2, 11:2 = 5.5, 22:3 = 7.33, 30:4 = 7.5, 36:5 = 7.2

15/4, 19 to 5, 53/15, 4:1, 18 to 6

Least to greatest: 15/4 = 3.75, 19:5 = 3.8, 53:15 = 3.53, 4:1 = 4, 18:6 = 3

7:11, 8:12, 6:10, 1/2, 7:4

Least to greatest: 7:11 = 0.6364, 6:10 = 0.6, 8:12 = 0.6667, 1/2 = 0.5, 7:4 = 1.75

A ratio in mathematics demonstrates how many times one number is present in another.

For instance, if a dish of fruit contains eight oranges and six lemons, the ratio of oranges to lemons is eight to six.

The ratio of oranges to the overall amount of fruit is 8:14, and the ratio of lemons to oranges is 6:8.

Therefore,

The ratios listed in the question are ordered from least to greatest by converting each ratio into a decimal and comparing the values.

In each case, the fraction is divided, the ratio of two numbers is expressed as a decimal, and then the decimals are ordered from least to greatest.

For example, in the first list, the ratio "11 to 2" is expressed as the decimal 11/2, which is equal to 5.5. The other ratios are similarly expressed as decimals and then ordered to get the final answer.

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